The Sons of Liberty Gun Works A5 Buffer System is a complete buffer tube assembly featuring an A5H2 buffer Sprinco green spring and 9-position A5 buffer tube for enhanced AR rifle performance.SOLGW A5 Buffer System Complete KitA5H2 buffer for optimized cyclingSprinco green spring for reliable operation9-position A5 buffer tubeFCD castle nut and quick detach end plate includedCompatible with AR riflesBlack finishThis complete buffer system provides improved reliability and smoother operation for AR-15 platform rifles offering precision-engineered components for serious shooters and builders.